Locking thread carrier bar



' Feb. 17, 1942. F. CECKA 2,273,248

LOCKING THREAD CARRIER BAR Filed Nov. 29, 1940 2 Sheets-Sheet 1 Feb. 17, 1942. F. CEC KA 2,273,243

LOCKING THREAD CARRIER BAR Filed Nov. 29, 1940 2 Sheets-Sheet 2 11 III -LIl Li L N & a

nil! Elli W k fi Q Q W W Z x a A 1 2 il IIHHIIIIIIH ll f I l I l ll ,llll m m N l| III M Hi Fatented Feb. 3?, 1%42 LOCKING THREAD CARRIER BAR Franz Cecka, Chemnitz, Germany, assignor to Schubert & Salzcr Maschinenfabrik Aktiengesellschaft, Chemnitz, Germany Application November 29, 1940, Serial No. 367,837

In Germany December 5, 1939 8 Claims.

The present invention relates to a device for locking the thread carrier bars of flat knitting machines.

With the hitherto used devices for locking the thread carrier bars of flat knitting machines all thread carrier bars are locked in the moment they strike against stops limiting their stroke, whereupon on movement in'the opposite direction all the thread carrier bars are unlocked again, so that the inoperative thread carrier bars may be displaced under the influence of vibrations of the machine.

To prevent this drawback an electromagnetic control mechanism for the locking devices of the thread carrier bars has been proposed by which some of the locking devices only are actuated in such a manner that the operative bars are released only in the momentof their departure.

Moreover, to obviate the disadvantage mentioned above a purely mechanical solution also has been proposed which prevents the drawback occurring in connection with electric control mechanisms.

Both solutions, however, require, for, efiecting the control of the corresponding commands, so-

called pattern devices which in a manner known per se may consist of drums, chains, cards, or the like.

The devices according to the present invention are characterized by the fact that looking levers acting upon the thread carrier bars are directly influenced by the change device of the thread carrier bars without' requiring special pattern mechanisms.

In the accompanying drawings one construc- The slide l5 also is displaceably mounted in a casing, not shown in the drawings. Theslide |'5 is provided with a conveyor dog. It which is adapted to cooperate with the projections" oi the thread carrier bars 3, 4 and 5. v

In a bearing block |8, connected to thenarrowing device mounted at each side of the machine, a shaft I9 is journalled upon which double-armed locking levers 20, 2| for the thread carrier bars 3, 4 and 5 are pivotally mounted. Fixed upon the end of each thread carrier bar 3, 4 and 5 is a locking block 22 which in a manner known per se cooperates with the corresponding locking lever 20, 2|.

Mounted upon an arm provided at the bearing block l8 of the shaft l9 are springs 23 the other ends'of which are connected to the corresponding lever'arms 2|.

Journalled in the bear g block I3 is another shaft 24 upon which cut awaydoubleearmed levers 25, 26 are arranged. The cut away endsof the lever arms 26 extend into the range of, the corresponding lever arms 2 l' ofthe locking levers 20, 2|. Arranged upon -the shaft 24 is an. arm 21 in which abolt '28 is journalled. In the range 01 the locking lever arms 26 a lever 30 provided with a handle 29 is pivoted upon the bolt 23.

Fixed to the arms l and II are holders 3| each provided with..,a forkforming a guide.

ill} Mounted in the holder 3i is a lifting rail 32 tion according to the invention is shown by way I of example.

-In these drawings:

Fig. 1 is a side elevation of a device according to the invention, Fig. 2 shows a rear view ing to Fig. 1,

of, the device accord- Fig. 3 is a rear view looking in the direction. of y the arrow A of Fig. 1, and v Fig. 4 is a .perspectiveview of a detail.

The thread carrier bars |8 are arranged in the :machnein a manner known per so. The thread carrier; bars 3, 4 and 5, for instance, are controlled ,by a special change device of the thread carrier bars.

Upon a shaft 9, adapted to be swung by a pattern mechanism, arms I0, II and 12 are fixed which are connected. together by a rod I3. In a manner known per se, a slide I is displaceably which is acted upon by springs 33. In accordance with. the lever arms 26 the ends of the lever arms also arecut away and extend into the'range of the adjustable lifting rai132. Fixed upon a shaft 34 are levers; 35. One of these levers 35 is by means of. a bolt 35 connected to one end of a link 31 the other end-of which is con-- nected to a cam lever 33,-the roller 39 of which mounted upon the rod i3 by way of a fork I4.

vin the drawings'is act ed may be influenced by 331 .Q -By means of a spring 4| the roller 33 is hel to contact with the cam 40.

The operation of thel de vi'ce according to the invention is as follows; H If one of the pattern mecha his. not shown e shaft 9 and therewith the leverslfl'j'jll'jand'j i2} are swung.

Hereby the rod 13 also'fisswung which by way of the fork |4 displaces th' 'de 15 the conveyor dog l6 of which adjusts its a projection H of one of the thread carrie'?*'l:ia-i"s'' 3; 4,- 5. During the subsequent movement of the cam lever 38 which positively is started by the cam 4|) the shaft 34 and therewith the lever 35 is swung by way of the link 31. The lifting rail 32 mounted in the holder 3| is hereby caused to rise. This again causes lifting of the lever arm 25 adjusted upon the lifting rail 32 and lowering of the corresponding lever arm 26 which efiects downward shiftment of the-lever arm 2| of one of the looking levers 20, 2| situated in the range of this lever arm 26, whereby the other arm 20 of the locking lever releases the corresponding locking block 22 and therefore the corresponding thread carrier bar.

This operationis repeated at each change of the thread carrier in accordance with the sequence determined by the pattern mechanism.

As may be seen from Fig. 4, by means of the lever 30 all thread carrier bars 3, 4 and 5 to be changed may together be released by a single handle.

It is of no importance in which manner the change device for the thread carrier bars operates and how the change device is constructed.

Of particular importance, ,however, is the direct dependency of the locking device on the change device for the thread carrier bars without special pattern mechanisms being required.

What I claim is:

1. A flat knitting machine, comprising thread carrier bars, stops limiting the movement of said thread carrier bars, means for automatically looking all said thread carrier bars as soon as they reach their corresponding stops, means for releasing those of said thread carrier bars which continue to operate on movement in opposite direction, a change device for said thread carrier 7 bars, including a pattern controlled shaft, pivotcontinue to operate on movement in opposite direction, a change device for said thread carrier bars, including a pattern controlled shaft, a slide influenced by said pattern controlled shaft, a

lifting rail loosely-connected to said slide and actuated by said pattern controlled shaft, locking levers acting upon' said thread carrier bars,

springs pressing said locking levers to locking positions, and a cam controlled mechanism for releasing said locking levers.

3. Afiat knitting machine, comprising thread carrier bars, stops limiting the movement of said thread carrier bars, means for automatically locking allsaid thread carrier bars as soon as they reach their corresponding stops, means for releasing those of said thread carrier'bars which continue to operate on movement in opposite direction, a change device for said thread carrier bars, including a pattern controlled shaft, a cam controlled mechanism, a plurality of slides innuenced by said pattern controlled shaft, a lifting rail loosely connected to said slides and actuated by said pattern controlled shaft and said cam controlled mechanism, locking levers acting upon said thread carrier bars, springs pressing said locking levers to locking position, and said cam controlled mechanism adapted to release said locking levers.

4. A fiat knitting machine, comprising thread carrier bars, stops limiting the movement of said thread carrier bars, means for automatically locking all said thread carrier bars as soon as they reach their corresponding stops, means for releasing those of said thread carrier bars which continue to operate on movement in opposite direction, a change device for said thread carrier bars, including a pattern controlled shaft, a slide influenced by said pattern controlled shaft, a lifting rail, double-armed levers actuated by said lifting rail, locking levers influenced by said double-armed levers and acting upon said thread carrier bars, springs pressing said locking levers to locking position, and a cam controlled mechanism for releasing said locking levers.

5. A fiat knitting machine, comprising thread carrier bars, stops limiting the movement of said thread .carrier bars, means for automatically locking all said thread carrier bars as soon as they reach their corresponding stops, means for releasing those of said thread carrier bars which continue to operate on movement in opposite direction, a change device for said thread carrier bars, including a pattern controlled shaft, a cam controlled mechanism, a plurality of slides influenced by said pattern controlled shaft, a lifting rail influenced by said pattern controlled shaft and said cam controlled mechanism, doublearmed levers actuated by said lifting rail, locking levers influenced by said double-armed levers and acting upon said thread'carrier bars, springs pressing said locking levers to locking position, and said cam controlled mechanism adapted to release said locking levers;

6. A flat knitting machine as set forth in claim 4 in which the number of said doublearmed levers actuated by said lifting rail is equal to the number of thread carrier bars to be changed and in which said double-armed levers are cut away in such a manner, that on a change of the thread carrier bars occurring said lifting rail and said slide are commonly and positively adjusted to the corresponding double-armed lever and consequently to the locking lever.

7. A flat knitting machine as sete forth in claim' 5 in which the number of said doublearmed levers actuated by said lifting rail is equal to the number of thread carrier bars to be changed and in which said double-armed levers are cut away in such a manner, that on a change of the thread carrier bars occurring said lifting rail and said slides are commonly and positively adjusted to the corresponding double-armed lever and consequently to the locking lever.

8. A flat knitting machine as set forth in claim 2, in which said cam mechanism comprises a shaft, a plurality of levers, fixed to said shaft and adapted to shift said lifting rail, a cam controlling said shaft, a lever actuated by said cam, and a link connected to said lever actuated by said cam and to one of said levers fixed to said shaft vFiEtANZ CECKA. 

